Chemical Engineering - Polymer Technology
Exercise :: Polymer Technology - Section 3
| 41. |
Synthetic rubber |
| A. |
deforms, if stretched to double of its original dimension. | | B. |
is brittle at low temperature | | C. |
is softer at higher temperature. | | D. |
is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases. |
Answer: Option D
Explanation:
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| 42. |
Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the |
| A. |
electrical insulation purpose. | | B. |
tanning of leather. | | C. |
strengthening of plaster of paris. | | D. |
decorative laminates. |
Answer: Option C
Explanation:
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| 43. |
In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ? |
| A. |
PTFE | | B. |
Buna-S | | C. |
PMMA | | D. |
Polycaprolactum |
Answer: Option B
Explanation:
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| 44. |
Cation exchange resins used in water treatment is made from __________ resin. |
| A. |
urea formaldehyde | | B. |
epoxy | | C. |
amino | | D. |
phenolic |
Answer: Option A
Explanation:
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| 45. |
Size range of polymer molecules varies from __________ metre. |
| A. |
10-2 to 10-5 | | B. |
10-4 to 10-7 | | C. |
10-1 to 10-2 | | D. |
10-8 to 10-10 |
Answer: Option A
Explanation:
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